...is predominantly responsible for language-related behaviour is the clearest and most dramatic example of an asymmetry of function in the human brain. This functional asymmetry is related to hand preference and probably to anatomical differences, although neither relationship is simple.

...in reaction-time tasks are positively correlated with body temperature in adults; (2) psychotics show longer reaction times and poorer tracking scores than do people of normal personality; (3) right-handed operators are favoured on the rotary pursuitmeter, while left-handed persons tend to do better on the complex coordinator; (4) left-handed people are more variable in finger-dexterity...

the ability to use both the right and the left hand with equal ease. Handedness is the most visible manifestation of laterality, a characteristic of the human brain that localizes certain functions to either the right or left hemisphere. The origin of handedness (or the absence of it, in the case...